Hybel, N. (1989). Crisis or change: The concept of crisis in the light of agrarain structural reorganization in late medieval England. Aarhus University Press.
Lua i Stíl Chicago (17ú heag.)Hybel, Nils. Crisis or Change: The Concept of Crisis in the Light of Agrarain Structural Reorganization in Late Medieval England. [Aarhus]: Aarhus University Press, 1989.
Lua MLA (8ú heag.)Hybel, Nils. Crisis or Change: The Concept of Crisis in the Light of Agrarain Structural Reorganization in Late Medieval England. Aarhus University Press, 1989.
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